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Chart PolskiBy Kristen Seymour Some types of dogs seem to become more and more popular over time, and others are far less common than they were a decade ago. But some dogs are just plain scarce. In some cases, it's because these breeds are not generally found in the United States; other breeds are simply more recent mixes that might not have caught on just yet. Whether they're wildly popular or totally uncommon, we love dogs, period, and we thought it would be fun to share a few of the dogs from our breed profiles that you aren't likely to run into on your morning walk. Have you heard of any of these pups?Chart Polski Muscular and slender, the Chart Polski loves to run. He’s more protective and territorial than most sighthounds and was used as a hunting dog as early as the 1600s. The breed faced extinction in the 19th and 20th centuries, but the Polish Greyhound, as he’s also known, made a comeback in Poland in the 1980s. (Credit: Eva Maria Kramer, Animal Photography) More from VetStreet.com: 11 Strangest Looking Dog BreedsUnique Pet Names That Are a Real MouthfulWhy Veterinarian's Hate the Retractable Leash

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